[Qemu-devel] Re: [kvm-devel] [ kvm-Bugs-1802223 ] nics have same hw address (rtl8139)

[Laurent Vivier <Laurent.Vivier@bull.net>]

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Daniel P. Berrange wrote:
> On Wed, Sep 26, 2007 at 05:47:20PM +0200, Laurent Vivier wrote:
>> Hi,
>>
>> I think there is a bug in qemu RTL8139.
>>
>> RTL8139 uses:
>>
>> cpu_register_physical_memory(addr + 0, 0x100, s->rtl8139_mmio_io_addr);
>>
>> But in the comment of cpu_register_physical_memory() we have:
>>
>> "'size' must be a multiple of the target page size."
>>
>> And I think 0x100 is not a multiple of target page size.... :-P
> 
> Latest upstream QEMU has fixed its memory handling so that MMIO regions
> do not need to be a multiple of page size. Changing RTL8139 to use a
> block of size 0x1000 is a reasonable short term hack around the problem,
> but syncing with latest QEMU is the real solution, since there are other
> places in the code which will have similar issues.
> 

So this explains why rtl8139.c from QEMU CVS always uses 0x100.

Thank you for the comment.

Avi, you know what you have to do ;-)

Laurent
-- 
------------- Laurent.Vivier@bull.net  --------------
          "Software is hard" - Donald Knuth


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